LOW ELECTRICAL RESISTANCE OF THE AUTOPILOT AILERON ACTUATOR FOR UNSPECIFIED REASONS WHICH RESULTED IN AN UNCOMMANDED ROLL TO THE RIGHT.
— NTSB Determination
THE FLIGHT EXPERIENCED AN UNCOMMANDED ROLL TO THE RIGHT DURING DESCENT FOR LANDING. THE 'B' AUTOPILOT SYSTEM WAS ENGAGED AT THE TIME. POST INCIDENT EXAMINATION SHOWED THE 'B' AUTOPILOT AILERON ACTUATOR HAD LOW ELECTRICAL RESISTANCE. TESTS BY BOEING COMMERCIAL AIRPLANE COMPANY HAVE SHOWN THAT LOW ELECTRICAL RESISTANCE WITHIN THE AUTOPILOT AILERON ACTUATOR WILL CAUSE UNCOMMANDED ROLL OCCURRENCES.
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THE FLIGHT EXPERIENCED AN UNCOMMANDED ROLL TO THE RIGHT DURING DESCENT FOR LANDING. THE 'B' AUTOPILOT SYSTEM WAS ENGAGED AT THE TIME. POST INCIDENT EXAMINATION SHOWED THE 'B' AUTOPILOT AILERON ACTUATOR HAD LOW ELECTRICAL RESISTANCE. TESTS BY BOEING COMMERCIAL AIRPLANE COMPANY HAVE SHOWN THAT LOW ELECTRICAL RESISTANCE…
The accident on 1995-08-25 involved a Boeing 737-3B7, registration N373US, operated by Usair, Inc., at Fort Lauderdale, FL.
LOW ELECTRICAL RESISTANCE OF THE AUTOPILOT AILERON ACTUATOR FOR UNSPECIFIED REASONS WHICH RESULTED IN AN UNCOMMANDED ROLL TO THE RIGHT.
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